CHEVROLET CAMARO ABS PROBLEM

1995 Chevrolet Camaro • 19,200 miles

MY BRAKE LIGHT, LOW OIL LIGHT, AND ABS INOP LIGHT KEEP COMING ON. MY BRAKE LIGHT IS ALWAYS ON NOW BUT THE OTHER TWO LIGHTS COME ON AND OFF AT DIFFERENT TIMES. MY BRAKES ARE FINE AS WELL AS MY BRAKE LIGHTS. WHAT DO YOU THIMK COULD BE WRONG?